'I HAD TO SKIP NIGHTS OUT AS I WAS IN SO MUCH PAIN'

"I first remember suffering with IBS symptoms at the age of 16. The onset was quite sudden - I would feel bloated and I had debilitating cramps, especially after eating, and would be confined to the bathroom.

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"My life changed dramatically. I suddenly couldn't eat any dairy, gluten, coffee, too much fruit, too much fibre, or anything processed or fried without it triggering a flare-up.